Employee Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2018

Defined Benefit Pension Plans

Components of Net Periodic Defined Benefit Cost (Income)

The components of net periodic defined benefit pension cost are presented in the table below.

	Three months ended
	March 31,
	2017			2018
	(In thousands)
Interest cost	$	506		$	372
Expected return on plan assets		(689	)		(590	)
Recognized actuarial losses		394			365
Total	$	211		$	147

OPEB

Components of Net Periodic Defined Benefit Cost (Income)

The components of net periodic postretirement benefits other than pension (OPEB) income are presented in the table below.  

	Three months ended
	March 31,
	2017			2018
	(In thousands)
Interest cost	$	20		$	15
Recognized actuarial gains		(54	)		(63	)
Total	$	(34	)	$	(48	)